<template>
  <div>
    <preview title="基础用法">
      <el-tag>标签一</el-tag>
      <el-tag type="success">标签二</el-tag>
      <el-tag type="info">标签三</el-tag>
      <el-tag type="warning">标签四</el-tag>
      <el-tag type="danger">标签五</el-tag>
    </preview>

    <preview title="可移除标签">
      <el-tag closable>标签一</el-tag>
      <el-tag type="success" closable>标签二</el-tag>
      <el-tag type="info" closable>标签三</el-tag>
      <el-tag type="warning" closable>标签四</el-tag>
      <el-tag type="danger" closable>标签五</el-tag>
    </preview>

    <preview title="不同尺寸">
      <el-tag closable>默认标签</el-tag>
      <el-tag size="medium" closable>中等标签</el-tag>
      <el-tag size="small" closable>小型标签</el-tag>
      <el-tag size="mini" closable>超小标签</el-tag>
    </preview>

    <preview title="动态编辑标签">
      <el-tag
        :key="tag"
        v-for="tag in dynamicTags"
        closable
        :disable-transitions="false"
        @close="handleClose(tag)">
        {{tag}}
      </el-tag>
      <el-input
        class="input-new-tag"
        v-if="inputVisible"
        v-model="inputValue"
        ref="saveTagInput"
        size="small"
        @keyup.enter.native="handleInputConfirm"
        @blur="handleInputConfirm"
      >
      </el-input>
      <el-button v-else class="button-new-tag" size="small" @click="showInput">+ New Tag</el-button>
    </preview>

  </div>
</template>

<script>
  export default {
    data() {
      return {
        dynamicTags: ['标签一', '标签二', '标签三'],
        inputVisible: false,
        inputValue: ''
      };
    },
    methods: {
      handleClose(tag) {
        this.dynamicTags.splice(this.dynamicTags.indexOf(tag), 1);
      },

      showInput() {
        this.inputVisible = true;
        this.$nextTick(_ => {
          this.$refs.saveTagInput.$refs.input.focus();
        });
      },

      handleInputConfirm() {
        let inputValue = this.inputValue;
        if (inputValue) {
          this.dynamicTags.push(inputValue);
        }
        this.inputVisible = false;
        this.inputValue = '';
      }
    }
  }
</script>

<style lang="scss" scoped>
  .el-tag + .el-tag {
    margin-left: 10px;
  }

  .button-new-tag {
    margin-left: 10px;
    height: 32px;
    line-height: 30px;
    padding-top: 0;
    padding-bottom: 0;
  }

  .input-new-tag {
    width: 90px;
    margin-left: 10px;
    vertical-align: bottom;
  }
</style>
